how do u smile?

I don't know how I do it everyday I wake up and say it's going to be okay but I know it's not my phone is something that's a signature to me something that I only know that is beyond me I can't smile not without forcing it or making it on a spot cuz I know I'm supposed to supposed to be smiling and bubbly and happy but I just don't feel it like you did my smile is fake I don't know what else to say I just don't like smiling it's too much work in the morning but I do it for the sake of my mom and dad because then they'll ask questions and my dad will brush it off like it's nothing but I know it's something and I'm starting to get worried my smile isn't returning I don't know how to smile properly and for once in a while baby 6 months or so I'll smile genuinely but it's never real to me it's nothing that I can make I don't know how to smile my real smiles are full of joy and happiness but for some reason I can't do it I can't keep on fake smiling I'm at my breaking point and no matter who I do it for it just feels like a chore I can't do it anymore I want to cry I want to lock myself in my room and never see daylight I don't want to smile for something that's fake but I do it anyway so questions arent raised